Gamma change : gamma A and gamma B are two types of change. Gamma A occurs when individuals perceive change within an existing paradigm or way of thinking, Gamma B occurs when individuals perceive a replacement of one paradigm with another paradigm that contains new variables.

Generativity : the development of a capacity to focus on the generations that will follow oneself.

Gerontology : the study of older individuals. This approach suggest that while it may take longer for older adults to learn new knowledge and skills and that they tend to make more errors during learning, older adults can and do attain performance levels equals to those achieved by younger adults.